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Finding the Fourth Proportional to 316,170.65, 436,325.87 and 172,930.70

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Solution

The fourth proportional to 316,170.65, 436,325.87 and 172,930.70 is: 238,650.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,170.65 : 436,325.87 = 172,930.70 : x
  2. Step 2: Convert to fraction form
    316,170.65/436,325.87 = 172,930.70/x
  3. Step 3: Cross multiply
    316,170.65x = 436,325.87 × 172,930.70
  4. Step 4: Simplify right side
    316,170.65x = 75,454,139,650.35
  5. Step 5: Solve for x
    x = 75,454,139,650.35/316,170.65
  6. Step 6: Final answer
    x = 238,650.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.